patch-2.3.2 linux/fs/hpfs/hpfs_fn.h

• Lines: 315
• Date: Thu May 13 23:48:20 1999
• Orig file: v2.3.1/linux/fs/hpfs/hpfs_fn.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.1/linux/fs/hpfs/hpfs_fn.h linux/fs/hpfs/hpfs_fn.h
@@ -0,0 +1,314 @@
+/*
+ *  linux/fs/hpfs/hpfs_fn.h
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  function headers
+ */
+
+//#define DBG
+//#define DEBUG_LOCKS
+
+#include <linux/fs.h>
+#include <linux/hpfs_fs.h>
+#include <linux/errno.h>
+#include <linux/malloc.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/locks.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <asm/bitops.h>
+#include <asm/segment.h>
+#include <asm/uaccess.h>
+
+#include <stdarg.h>
+
+#include "hpfs.h"
+
+#define memcpy_tofs memcpy
+#define memcpy_fromfs memcpy
+
+#define EIOERROR  EIO
+#define EFSERROR  EPERM
+#define EMEMERROR ENOMEM
+
+#define ANODE_ALLOC_FWD	512
+#define FNODE_ALLOC_FWD	0
+#define ALLOC_FWD_MIN	16
+#define ALLOC_FWD_MAX	512
+#define ALLOC_M		1
+#define FNODE_RD_AHEAD	16
+#define ANODE_RD_AHEAD	16
+#define DNODE_RD_AHEAD	4
+
+#define CHKCOND(x,y) if (!(x)) printk y
+
+#ifdef DBG
+#define PRINTK(x) printk x
+#else
+#undef PRINTK
+#define PRINTK(x)
+#endif
+
+typedef void nonconst; /* What this is for ? */
+
+/*
+ * local time (HPFS) to GMT (Unix)
+ */
+
+extern inline time_t local_to_gmt(struct super_block *s, time_t t)
+{
+	extern struct timezone sys_tz;
+	return t + sys_tz.tz_minuteswest * 60 - (sys_tz.tz_dsttime ? 3600 : 0) +s->s_hpfs_timeshift;
+}
+
+extern inline time_t gmt_to_local(struct super_block *s, time_t t)
+{
+	extern struct timezone sys_tz;
+	return t - sys_tz.tz_minuteswest * 60 + (sys_tz.tz_dsttime ? 3600 : 0) -s->s_hpfs_timeshift;
+}
+
+/*
+ * conv= options
+ */
+
+#define CONV_BINARY 0			/* no conversion */
+#define CONV_TEXT 1			/* crlf->newline */
+#define CONV_AUTO 2			/* decide based on file contents */
+
+/* Four 512-byte buffers and the 2k block obtained by concatenating them */
+
+struct quad_buffer_head {
+	struct buffer_head *bh[4];
+	void *data;
+};
+
+/* The b-tree down pointer from a dir entry */
+
+extern inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
+{
+  CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
+  return *(dnode_secno *) ((void *) de + de->length - 4);
+}
+
+/* The first dir entry in a dnode */
+
+extern inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode)
+{
+  return (void *) dnode->dirent;
+}
+
+/* The end+1 of the dir entries */
+
+extern inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
+{
+  CHKCOND(dnode->first_free>=0x14 && dnode->first_free<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %d\n",(int)dnode->first_free));
+  return (void *) dnode + dnode->first_free;
+}
+
+/* The dir entry after dir entry de */
+
+extern inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
+{
+  CHKCOND(de->length>=0x20 && de->length<0x800,("HPFS: de_next_de: de->length = %d\n",(int)de->length));
+  return (void *) de + de->length;
+}
+
+extern inline struct extended_attribute *fnode_ea(struct fnode *fnode)
+{
+	return (struct extended_attribute *)((char *)fnode + fnode->ea_offs);
+}
+
+extern inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
+{
+	return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->ea_size_s);
+}
+
+extern inline struct extended_attribute *next_ea(struct extended_attribute *ea)
+{
+	return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea->valuelen);
+}
+
+extern inline secno ea_sec(struct extended_attribute *ea)
+{
+	return *(secno *)((char *)ea + 9 + ea->namelen);
+}
+
+extern inline secno ea_len(struct extended_attribute *ea)
+{
+	return *(secno *)((char *)ea + 5 + ea->namelen);
+}
+
+extern inline char *ea_data(struct extended_attribute *ea)
+{
+	return (char *)((char *)ea + 5 + ea->namelen);
+}
+
+extern inline unsigned de_size(int namelen, secno down_ptr)
+{
+	return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
+}
+
+extern inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src)
+{
+	int a = dst->down;
+	int n = dst->not_8x3;
+	if (!dst || !src) return;
+	memcpy((char *)dst + 2, (char *)src + 2, 28);
+	dst->down = a;
+	dst->not_8x3 = n;
+}
+
+extern inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n)
+{
+	int i;
+	if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
+	if (!((bmp[(b & 0x3fff) >> 5] >> (b & 0x1f)) & 1)) return 1;
+	for (i = 1; i < n; i++)
+		if (/*b+i < 0x4000 &&*/ !((bmp[((b+i) & 0x3fff) >> 5] >> ((b+i) & 0x1f)) & 1))
+			return i + 1;
+	return 0;
+}
+
+/* alloc.c */
+
+int hpfs_chk_sectors(struct super_block *, secno, int, char *);
+secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int);
+int hpfs_alloc_if_possible_nolock(struct super_block *, secno);
+int hpfs_alloc_if_possible(struct super_block *, secno);
+void hpfs_free_sectors(struct super_block *, secno, unsigned);
+int hpfs_check_free_dnodes(struct super_block *, int);
+void hpfs_free_dnode(struct super_block *, secno);
+struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *, int);
+struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
+struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);
+
+/* anode.c */
+
+secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *);
+secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
+void hpfs_remove_btree(struct super_block *, struct bplus_header *);
+int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
+int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, char *);
+void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
+void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
+void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
+
+/* buffer.c */
+
+void hpfs_lock_creation(struct super_block *);
+void hpfs_unlock_creation(struct super_block *);
+void hpfs_lock_iget(struct super_block *, int);
+void hpfs_unlock_iget(struct super_block *);
+void hpfs_lock_inode(struct inode *);
+void hpfs_unlock_inode(struct inode *);
+void hpfs_lock_2inodes(struct inode *, struct inode *);
+void hpfs_unlock_2inodes(struct inode *, struct inode *);
+void hpfs_lock_3inodes(struct inode *, struct inode *, struct inode *);
+void hpfs_unlock_3inodes(struct inode *, struct inode *, struct inode *);
+void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
+void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
+void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
+void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *);
+void hpfs_brelse4(struct quad_buffer_head *);
+void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);
+
+/* dentry.c */
+
+void hpfs_set_dentry_operations(struct dentry *);
+
+/* dir.c */
+
+int hpfs_dir_read(struct file *, char *, size_t, loff_t *);
+int hpfs_dir_release(struct inode *, struct file *);
+int hpfs_readdir(struct file *, void *, filldir_t);
+struct dentry *hpfs_lookup(struct inode *, struct dentry *);
+
+/* dnode.c */
+
+void hpfs_add_pos(struct inode *, loff_t *);
+void hpfs_del_pos(struct inode *, loff_t *);
+struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, unsigned char *, unsigned, secno);
+void hpfs_delete_de(struct super_block *, struct dnode *, struct hpfs_dirent *);
+int hpfs_add_to_dnode(struct inode *, dnode_secno, unsigned char *, unsigned, struct hpfs_dirent *, dnode_secno);
+int hpfs_add_dirent(struct inode *, unsigned char *, unsigned, struct hpfs_dirent *, int);
+int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
+void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
+dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
+struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
+struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, char *, unsigned, dnode_secno *, struct quad_buffer_head *, int *depth);
+void hpfs_remove_dtree(struct super_block *, dnode_secno);
+struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);
+
+/* ea.c */
+
+void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
+char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
+void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int);
+
+/* file.c */
+
+int hpfs_file_release(struct inode *, struct file *);
+int hpfs_open(struct inode *, struct file *);
+int hpfs_file_fsync(struct file *, struct dentry *);
+secno hpfs_bmap(struct inode *, unsigned);
+void hpfs_truncate(struct inode *);
+ssize_t hpfs_file_read(struct file *, char *, size_t, loff_t *);
+ssize_t hpfs_file_write(struct file *, const char *, size_t, loff_t *);
+
+/* inode.c */
+
+void hpfs_read_inode(struct inode *);
+void hpfs_write_inode_ea(struct inode *, struct fnode *);
+void hpfs_write_inode(struct inode *);
+void hpfs_write_inode_nolock(struct inode *);
+int hpfs_notify_change(struct dentry *, struct iattr *);
+void hpfs_write_if_changed(struct inode *);
+void hpfs_delete_inode(struct inode *);
+
+/* map.c */
+
+unsigned *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
+unsigned *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
+char *hpfs_load_code_page(struct super_block *, secno);
+secno *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
+struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
+struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
+struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *);
+dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
+
+/* mmap.c */
+
+int hpfs_mmap(struct file *, struct vm_area_struct *);
+
+/* name.c */
+
+unsigned char hpfs_upcase(unsigned char *, unsigned char);
+int hpfs_chk_name(unsigned char *, unsigned);
+char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
+int hpfs_compare_names(struct super_block *, unsigned char *, unsigned, unsigned char *, unsigned, int);
+int hpfs_is_name_long(unsigned char *, unsigned);
+void hpfs_adjust_length(unsigned char *, unsigned *);
+void hpfs_decide_conv(struct inode *, unsigned char *, unsigned);
+
+/* namei.c */
+
+int hpfs_mkdir(struct inode *, struct dentry *, int);
+int hpfs_create(struct inode *, struct dentry *, int);
+int hpfs_mknod(struct inode *, struct dentry *, int, int);
+int hpfs_symlink(struct inode *, struct dentry *, const char *);
+int hpfs_unlink(struct inode *, struct dentry *);
+int hpfs_rmdir(struct inode *, struct dentry *);
+int hpfs_readlink(struct dentry *, char *, int);
+struct dentry *hpfs_follow_link(struct dentry *, struct dentry *, unsigned int);
+int hpfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+
+/* super.c */
+
+void hpfs_error(struct super_block *, char *, ...);
+int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
+int hpfs_remount_fs(struct super_block *, int *, char *);
+void hpfs_put_super(struct super_block *);
+int hpfs_statfs(struct super_block *, struct statfs *, int);
+struct super_block *hpfs_read_super(struct super_block *, void *, int);